Casting-table.



W. J. GOLIGHTLY.

CASTING TABLE. APPucnnoN HLED mm 22, m2 RENEWED MAY 15.

Patentefl' Dee. 4,1917.

Bil f7 @NVENTOR. flay it I I CASTING-TABLE.

Specification of Letters Patent.

Application filed June 22. 1912, Serial No. 705.180. Renewed May 15,1916. Serial No. 97,729.

To all whom it may-concern:

Be it: known that 1, 11.11.01 J. Go- Lion'rLY. a citizen of the lfuitedStates, rcsidingat liokomo, in the county of lloward and State ofIndiana. have invented certain new and useful improvements in (lasting-Tablcs, of which the following is a speciti' cation.

This invention relates to casting tables used in the manufacture ofplate glass and the like, and it has for its primary objects; theprovision in a casting table of improved means for preventing warpingand distortion of the table, thereby securing a product of substantiallyuniform thickness: and the provision in a sectional casting table of animproved arrangement of fastening and cooling means, together with thepreventing distortion of the table. These, together with such otherobjects as may hereinafter appear, or are incidental to my invention, Iattain by means of a construction which I hate illustrated in preferredform in the accompanying drawings, wherein s Figure 1 is a perspectiveview of a casting table embodying my invention, portions of the tablebeing broken away to more clearly disclose the parts; and Fig. 2 is asection through part of the table drawn on an enlarged scale. V J

In casting plates of glass, it" has been found that the heat of theglass metal expands the upper portion of the casting table and causesthe table to warp. This warping usually takes the form of bowing up ofthe central portion of the table, and when the glass metal is rolledinto plate form, the plates are thin in'tho middle and thick at theedges. My invention is primarily intended to overcome this objection andse cure a better grade of product and reduce loss to a minimum.

Referring-to the drawings, it will be seen that my improved castingtable is con'lpose'd of a plurality of sections 7 which are boltedtogether at various points throughout their length by rods 8 and nuts 9,the apertures 10 for receiving the rods 8 beinglocated in the lowerportion of the sections for a purpose which will hereinafter appear. Inorder to secure the sections in proper position with relation to eachother, I provide each section with keyways 11, there being one keyway oneach side of a section. A .pli1' means for 1 ralit-y of keys 12 areplaced in the keyways and serve to keep the sections in alinement witheach other. The sections are cooled by means of steam, water, or othercooling agent, which is circulated through the pipes 13, of which thereare four to a section, the pipes being located in apertures ll formed inthe sections slightly above the censral portion thereof in substantiallythe same plane as the keyways 11. From inspection of Fig. 2, it will benoted that the width of the sections at the top is less than the widthat the bottom. and there is ,thus provided a narrow slot 15 betweeiTachsect-ion extending from the keyways. to the upper surface of thesections and throughout the length of the sections. In the drawings, thewidth of the slots has been exaggerated for purposes of illustration.

From the foregoing. it will be readily apparent that the upper portionsof the sec. tions may freely expand as they absorb heat from the hotglass metal being cast androlled, and that the lower portions of thesections will be in etl'cct insulated from the heat by the circulationmaintained in the pipes 13 The provision of the longitudinal slots 15 inthe upper surface of the table permits the upper portions of thesections to expand without causing bowing or other distortion of thetable. This arrangement is very advantageous for it is not practicableto cool the upper surface sutiiciently to prevent warping from expansionand at the same time avoid cracking from the extremes of heat .ind coldwhich would be present in such cooling arrangement. The importance ofsecuring a glass plate of as nearly uniform thickness as possible isespecially great in the manufacture of plate glass where, by the usualgrmdmg process the plate has to be reduced to accurately uniformthickness and of course much less grinding will be required if the roughplate before grinding more nearly approximates the finished dimensions.A further advantage of the con structionsis that thetable is very rigidand. securely bound together, while at the same time adequate provisionis made for expansion and contraction of the upper part of the table.This is obtained by the arrangement and location of the circulatingpipes with respect to the keys and binding rods. Other advantages willoccur to those familiar with the art.

Patented Dec. 41, 191W.

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lltitl lilltl Having thus described my invention and illustratedits use,what I claim as new and desire to secure by Letters Patent is thefollowing:

l. 1& casting table comprising a plurality of sections.which abut eachother at their lower portions and are, spaced away from each other attheir upper portions, means for binding the lower portions together, andmeans for insulating the lower portions of the sections from the actionof the heat from above.

2. A casting table e'omprising a plurality of sections which abut eachother at their lower portions and are spaced away from each other attheir upper portions, means for binding the lower portions together, andmeans for insulating the lower portions of the sections from the actionof the heat from above, said means being located in the sections abovethe binding means.

' 3. A casting table comprising in combination a plurality of sectionsplaced side by side, means for binding the sections together 2% so thattheir vertical edges abut one another,

and slots between the sections at the upper portions thereof adjacentthe vertical edges whereby free expansion and contraction of the upperportion of the table is permitted.

-4. A casting table comprising in eombination a body portion ha ing aplane casting surface, and a plurality of slots ofgreater depth thanWidth extending across the casting surface from end to end of the tablein substantial parallelism whereby the upper portion of the tablebetween lllOl slots can expand and contract freely without llexing thebottom portion of the table when the temperature of the upper portionvaries with that of the lower portion. 5. A casting table comprising incombination a body portion having a plane casting surface integraltherewith. and a plurality of slots of such width that the glasswillnotflow into them, extending over the casting surface of the table wherebythe upper portion of the table between the slots can expand and contractfreely without flexing the bottom portion of the table when thetemperature of the upper portion varies with respect to that of thelower portion.

(3. A casting table comprising in combination a. body portion having aplane casting surface integral therewith, and a plurality of slots ofgreater depth than width extending over the casting surface whereby theupper portion of the table between the slots can expand and contractfreely without flexing the bottom portion of the table when thetemperature of the upper portion varies with respect to that of thelower portion.

In testimony whereof I have hereunto signed my name in the presence ofthe two subscribed witnesses.

WILLIAM J. GOLIGHTLY. Witnesses:

J. E. CHANDLER, EARL B. BARNES.

